There was once a time when almost everyone had to be involved in food production for everyone to eat. Now it is less than 1% of the people. Today almost everyone creates wealth...
Could be more people though. America's(subsidized) addiction to mass produced corn and wheat products is not sustainable long term. Even the beef eat corn, it's awful.
The US is very protectionist over agriculture, but most nations are. Agriculture is the last thing to globalise. Nations still want food security is globalism breaks down.